TLSA Validation Failed

[Abdelmeniem Tharwat]

Dear Mark ,
	Thanks for your response , actually I am asked about how Viktor generate the TLSA record "The Correct" ?  as my problem was in the record
Generated by openssl command which is like what you sent to me "Same TLSA record".
It is working now , but may Viktor have a time to send me how he generated the TLSA record ?
Thanks

-----Original Message-----
From: dane-users-bounces at sys4.de [mailto:dane-users-bounces at sys4.de] On Behalf Of Abdelmeniem Tharwat
Sent: Tuesday, July 14, 2015 11:37 AM
To: 'dane-users at sys4.de'
Subject: RE: TLSA Validation Failed

Dear Viktor Dukhovni ,
	You are right , but kindly advice how can I get the TLSA record ? I used 

openssl x509 -in xn----ymcadjpj1at5o.xn--wgbh1c.registry.crt -outform DER | openssl sha256 (stdin)= 1a70df05ac43318ab35a16542a8736d077ace3126fafe00508edd7484f293c6c

And got what I did add to zone file.
Thnx 


-----Original Message-----
From: dane-users-bounces at sys4.de [mailto:dane-users-bounces at sys4.de] On Behalf Of Viktor Dukhovni
Sent: Tuesday, July 14, 2015 6:58 AM
To: dane-users at sys4.de
Subject: Re: TLSA Validation Failed

On Mon, Jul 13, 2015 at 09:04:34PM +0000, Abdelmeniem Tharwat wrote:

> And when I try to execute dig @8.8.8.8 
> _443._tcp.xn----ymcadjpj1at5o.xn--wgbh1c +dnssec TLSA, I got the TLSA record that is identical to the hash from crt file.

Both are wrong.

> The TLSA validator said that :-
> 
> [cid:image008.jpg at 01D0BDC0.1A30F150]
> 
> any advice !!!

The correct "3 0 1" TLSA for your server is:

    _443._tcp.xn----ymcadjpj1at5o.xn--wgbh1c. TLSA 3 0 1 AD562370D03DFBE4EDFC4780A2367C8FD086D8A00D53A80D8EC6A8909D50DA9A

What you've published is:

    _443._tcp.xn----ymcadjpj1at5o.xn--wgbh1c. TLSA 3 0 1 1A70DF05AC43318AB35A16542A8736D077ACE3126FAFE00508EDD7484F293C6C

No idea what that is the digest of, but it is not the digest of the DER form of the server certificate.

-- 
	Viktor.